Telegraph system



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l INVENTOR. BERNARD4 D. WILLIS, deceased WEYWALTER OWEN, Execuor @fw-,M M

ATTORNEYS RLS Oct. 24, 1944. B D, WILLI?,V Zg

TELEGRAPH SYSTEM INVENTOR. BERNARD D. WILLIS deceased WDXNALTER OWEN, Execuov mpwfm m ATTORNEYS B. D. WILLIS 2,36L42 TELEGRAPH SYSTEM Filed Maren es,v 1942 1v sheets-sheet 4 4H\ /42I 41E/I CIDI1 ^CH0 LcLoAr/TP Z COMBINED TRANSMITUNG STATION LINE CIR.

RECEIVING PRINTER 400 INVENTOR. H64 BERNARD D. WILLIS, deceased W171i? YWILILTEFI OWEN, Execufor ,fw/IC7,

ATTDRNEYS t. 24, 1944. V L B. D. WILLIS 2,361,342

TELEGRPH SYS TEM Filed March 6. 1942 1'7 Sheets-Sheet 5 "'^55I D532 sTATIoN SELECTOR 50o- I INE RsIo 559|/ l-I ISS' cuT IN, 594I` 52| HOLD 593 5624 V j R553 M588 [QLSE 543 fk 574\ v s I 589 TIMER a BUSY SY'V S595 R520 @44 5.72/

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- INVENToR. H65 BERNARD D. wILLIs, deceased INQBYWALTER OWEN, Executor ATTORNEYS oct. 24, 1944.

B. D. WlLLl TELEGRAPH SYSTEM Filed March 6, 1942 sTRowGERA MECH. 70d

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TELEGRAPH SYSTEM Filed March 6, 1942 17 Sheets-Sheet 8 CH2) /f CIIIZ K842 RM il 084|/ Lsn'ms l M'oToR 825 Q-M08 8825 j LAMP CONT- smTloN LINE om.

lcolvifslNraD TRANSMITTING RECEIVING PRlNTER P 22 INVENTOR. BERNARD D. WILLIS4 deceased WgYWALTER OWEN, Execu'or ATTORNEYS Oct. 24, 1944. B. D. wlLL'ls 2,36%342 Y TELEGRAPH SYSTEM l A Fiied March e, 1942 17 sheets-sheet 9 im Y BERNARD uwmffyfmdgased WQBY WALTER OWEN Execufor ATTORNEYS Oct. 24, 1944.4 B. D, wnLLls 2,36L342 TELEGRAPH SYSTEM BERNARD D. WILLIS, deceased WFTTYWALTER OWEN Execufor ATTORNEYS Ott. 24, 1944; B D, W|| 1s 2,361,342

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TELEGRAPH SYSTEM Filed March 6, 1942 17 Sheets-Sheet 14 MASTER POSITION I4CC THU/R443 '45V II/IoToR sT vRI450 MI445 H460 I AIIM'fCCNTRoI.l

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TELEGRAPH SYSTEM Filed March 6, 1942 17 Sheets-Sheet 15 MASTER SELECTOR |500 LINE ATTORNEYS Oct. 24, 1944.

TELEGRAPH SYSTEM Filed March 6., 1942 17 Sheets-Sheet 16 ATTORNEYS STROWGER MECH. |700 272 0,40" 1 e154 C155 m52 C155 om m50 )0 0-0-0-0 o o o o o o O Q /O OXID l@ l) l '-*2* f I' ,f/

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M INVNTOR a BERNARD D.w|L| ls, deceased oct. 24,- 1944. W B WMS 2,361,342

- TELEGRAPH SYSTEM Filed March 6, 1942 17 Sheets-Sheet 17 WBli. WALTER OWEN, Execufor y Mw, am?, ma 44M;

ATTORNEYS Patented Oct. 24, 1944 TELEGRAPH SYSTEM Berna-rd D. Willis, deceased, late of' Oak Park, Ill., by William Walter Owen, executor, Elgin, Ill., assigner to Automatic Electric Laboratories, Inc., a corporation of Delaware Application March 6, 1942, serial No. 433,583. 2s claims. (c1. 12s- 2) The present invention relates to signaling systems and more particularlyv to telegraph switching systems.

Prior automatic telegraph systems may be classified either as series systems or radial systems, depending upon the manner in which connections are set up therein. Each of these types of telegraph systems possesses both certain advantages and disadvantages with respect to the other in setting up the Vvarious types of connections. For example, the series type of telegraph system is extremely well suited to the setting up of different conference connections, but is considerably limited in the number of connections which may be set up concurrently; on the other hand, the radial type of telegraph system is eX- tremely well suited to the setting up of a large number of station-to-station connections concurrently, but is considerably limited in the number of different conference connections which may be set up.

Accordingly the principal object of the present invention-is to provide a telegraph system of the combined series and radial type, wherein ordinary station-to-station connections are set up on ai radial basis and conference connections are set up on a series basis.

Another object of the invention is to provide in a signaling system improved switching apparatus for setting up station-to-station connections on a radial basis.

Another object of the invention is to provide in a signaling system improved switching apparatus for setting up conference connections on a series basis.

A further object of the invention is to provide in a signaling system including a master position, a plurality of groups of stations and a correspending plurality of loops, improved switching apparatus for setting up different conference connections by way of the individual loops and including different combinations of the stations in the associated groups,

A further object of the invention is to provide in a signaling system including a master position, l

a plurality of groups of stations and a corresponding plurality of loops,r improved switching approved apparatus for overriding and releasing prior connections regardless of the type thereof.v

Further features of the invention pertain to the particular arrangement of the circuit elements of the telegraph system, whereby the above-outlined and additional operating features are attained. o The invention, both as to its organization and method of operation, together with further objects and advantages thereof, will best be understood by reference to the following specification taken in connection with the accompanying drawings, in which Figure 1 illustrates the general arrangement of a telegraph system embodying the present invention; Figs. 2 to 17, inclusive, taken together, illustrate the details of a telegraph system having incorporated therein the features briefly outlined above; and Fig. 18 illustrates the ,mode of combining Figs. 2 to 17, inclusive, to form a unified telegraph system.

Description of the apparatus incorporated in the telegraph system Referringnow more particularly to Fig. `1 of the drawings the telegraph system there illus,- trated comprises a master position |400 and a plurality of groups of stations arranged in a corresponding plurality' of loops; more specilically, the system comprises a first group of stations (including eight stations 2l to 2,8, inclusive) arranged in a first loop, a second group of stations (including eight stations 3| to 38, inclusive) arranged in a 'second loop, a third group .of stations (including eight stations 4| to 48, in-

y to, and the station selectors 500, 900, etc., 232,

paratus for setting up different conference connections'by way of all of the loops and including diiierent combinations of the stations in each of the groups.

A still further object of the invention is to provide in a signaling system including switching apparatus selectively controllable to set up station-to-station and conference connections, im-

232', etc., 242, 242', etc., and 252, 252', etc., individual thereto.

Also the telegraph system comprises loop common equipment |200, loop equipment individual to each loop and a loop repeater individual to each loop; more particularly, the first loop, the second loop, the third loop and the fourth loop are respectively provided with the rst loop equipment k300, the second loop equipment 233, the third loop equipment 243 and the fourth loop equipment 253, individual thereto, and the rst loop repeater |30|, the second loop repeater |302, the third loop repeater |303 and the fourth loop repeater |304, individual thereto. Finally a plurality of receiving printers P|40|, P|402 and P|403 are provided at the master position |400.

In the telegraph .system the master selector 500 has access to each individual station in each group, to each loop under the control of the individually associated loop equipment and to all of the loops under the control of the associated common loop equipment |200. Similarly, each individual station in each group has access to each other individual station in the same group, to each individual station in the other groupsand to the individually associated loop under the control of the individually associated loop equipment. Further it is noted that, when either the master selector |500 associated with the master position |400' orv anyv station selector indivi-dually asso'- ciated with one: of ther stationsseizesv any oneof the loops under' the controler theindivi'dually' associatedl'o'opi equipment', the loop equipment may be selectively controlled', whereby any' desired combination ofV two or'm'ore ofthe stationsin the seized loop may be out into the loop forcomnrunication purposes. Similarly, whenV they master selector |50 il'` associatedfwith the `master position i400? seizes all of the'I loops under' the control of the loop common' equipmentl |200, the'loop commonequipmentA |200: may be selectively controlled, whereby any combinationof one or more stations ini e'achof; the fIo'ops may be cut'into the associated loops for communication purposes. k

Considering nowl the4 trunkingrV arrangement' in greater detail Withreference to Figs.l 17, 'l and il; itis pointedout that themaster vselector |500 and eachk of; the station. selectors.Y 500,. 900,. etc. have access to the respective stations 2|?, 22', etc. inthenrst group by Way ofthe respective rst, second, etc. contact sets inthe second level in the contact banks of the associated Strowger mechanisms; the-selectorsmentioned'have access tothe respective stations 3|, 32; etc..in the second group by Way of the respectiveI first, second; etc'. contact sets inthe third level irrthe contact banks off the associated Strowger mechanisms; the selectors mentionedhave access to the respective stations 4|', 42, etc. in the third group by Way of the respective first,v second, etc. contact sets in vthe fourth level 'in the Contact banks ofthe associated Strovvger mechanisms; and the selectors mentioned have' accessto the respective stations' 5|, 52, etc. in the fourth group by Wayk ofthe respective first, second, etc. contact setsin the fifth contactsets inthe eighth level in the contact banks of the associated Strowger mechanisms; and the master selector 500 and the station selectors 252, etc., individually associated With the stations in the fourth group, have access to the terminal line conductors C|54 and C|55 of the fourth loop by way of the rst eight contact sets in the ninth level in the contact banks of the associated Strovvger mechanisms.v Finally the master selector 500 has access to the conductors C and C|4| extending to the primaries of the loop repeaters |30I', etc. by Way of the first four con- Y tion to the receivingy printers PMM, P1402 and PI4'03, a transmitting printer'Pli400; While each station comprises a combined transmitting-receiving-printer. For. example,V the: stations 2| and 22 respectively comprise'the' combined transmitting-receiving printers. P2 l" and P22,

Preferably, the transmitting printer P1400 provided at the masterl position |400 is of the Morkrum-Kleinschmidt type, comprising, as shown invFig. 14,l a dial D|44|, a releasekey K|442 a transmitter 'H4-43, a printer' magnet MI44`4, an operating motor M.| 445, a supervisory lamp Ll 440, a lamp control relay R|4 50, a motor start relay R|400 and a' control network. connected and arlevel in the contact banks of the associated Strowger mechanisms. Also'themaster selector `|500 andthe station'select'ors 5000;*etc., individually associated with the Vstations in the rst group, haveaccess to the terminal linefconductors C|0| and. Ct04` of. the first loop by Wayof the first` eight contact sets in the sixth level in the contact banks oi' the associated Strovvger' mechanisms; the master selector |5005and the station selectors 232', etc., individually. associated with the stations in the second group,have access tothe terminalline conductors C|50 and C|5| of the second'loop by way-ofthe first eight Vcontact sets vin the seventh level in` the contact banks of the' associated Strowger'mechanisms; the master selector |500 andthe station selectors 242, etc., individually associatedwiththe stations in the third group, have access tothe terminal line conductors C 52 and C|53 offthe third loopiby Way of the first eight ranged in' amanner more fully described hereinafter. Preferably, each of the receivingprinters provided at theA master position |400y is identical to the receivingprinter. P shown in Fig- 14, which is of the Morkrum-Kleinschmidt type comprising. a printer magnet-Mi41l3, an ope-rating motor MI4'I2, a motor start relay R|41f0 and a control network connected and arranged in a manner more-fully described hereinafter.- Further the master positionA |400comprises` apriority key K|4S5 which is utilized in conjunction with the master selector |500, for a purpose more fully described subsequently.

Preferably, the combined transmitting-receiving printer provided at each station is identical to the combined transmitting-receiving printers P2| and P22 respectively providedat the stations 2| and 22. Preferably, thetcombined transmittingreceiving printer P2|`lprovided at the station 2| is of the Morkrum-Kleinschmidt type'comprising, as shownin Fig. 4, a dial D44-|, a release key K442, a transmitter T443, aA printer magnet M444, an operating motor M445, a supervisory lamp L445, a lamp control relay R450, a motor start relay R460 andacontrolnetwork connected and arranged in amanner more fully described subsequently. Similarly, the combined transmitting-receiving printer P22y provided at the station 22 is of the Morkrum-Kleinschmidt type comprising, as shown in Fig. 8, a dial D04|, a release key K842, a transmitter T843, a printer magnet M844, an operating motor'M845; a supervisory lamp LMB, a lamp'control relay R850, aimotor start relay R800 and a control network connected and arranged in a manner more fully described subsequently.

.entially spaced-apart contact sets.

The master selector |500, shown in Figs. 415 to 17, inclusive`, comprises a Strowger mechanism |100 and'a minor switch |600, the minor switch |600 constituting a portion of a timing arrangement described in detail hereinafter. The Strowger mechanism 1100 comprises a wiper set, including the wipers |101 to 1106, inclusive, and

an associated contact bank arranged in ten vertical levels, each level including ten circumfer- Also the Strowger mechanism |100 includes a vertical magnet M1586 for moving'the wiper setin the vertical direction, a rotary magnet M1581 for moving the wiper set in the rotary direction and a release ma-gnet M1588 for releasing the wiper set and for causing it to be returned to its normal vertical and rotary positions. Alsoassociatedwith the Strowger mechanism 1100 are a number of sets of switch springs S1591, S1592, S1595 and S16-90 which are actuated bythe various movements of the wiper set, in a manner more fully described hereinafter. The minor switch 1600 comprises a rotary wiper 160| provided with an associated contact bank, including ten circumferentially spaced-apart contacts. Also the minor switch |600 includes a rotary magnet M1602 for rotating the wiper 160| and a release magnet M1603 forv releasing the wiper |601 and for causing it to be returned to its n ormal position.' Also a set of switch springs S1604 is associated with the minor switch 1600, which is actuated by the rotation of the wiper |601 in a manner more fully explained hereinafter.

Further the master selector 1590 comprises a relay group, including a line relay R1510, a hold relay R1540, a controlrelay R1 550, two 'series relays R1560 and R|590 ,two timer relays R|510 and R1 500, two control relays R|610 and R1521l, a release relay R1630, a switching relay R1540, a flash relay R|650, a testv relay R1660, a digit relay R1610 and a switch-through relay R1680,'and a control network connected and arranged in a vmanner more fully described hereinafter. Also the master selector 1500 comprises a battery 1629 supplying lll)V volt potential and four terminals W, X, Y and Z, the terminals W and Xbeing respectively connected to the conductors C1466 and C1461 extending to the priority key K1465 at the master position |400 and the terminals Y and Z being open-circuited, for a purpose more fully explained hereinafter.

Preferably, the station selector provided at each station is identical to the station selectors 500-and 900 respectively provided at the stationsl 21 and 22. rli'he station selector 500, shown' in Figs. 5 to '1, inclusive, comprises a Strowger mechanism 100 and a minor switch 600, the minor switch 600 constituting a portion of a timing arrangement described in detail hereinafter. The Strowger mechanism 100 comprises a wiper set, including the wipers 101 to 105, inclusive, and an associated Contact bank arranged in tenvertical levels, each level including ten circumferentially spaced-apart Contact sets. Also the Strowger mechanism'lll includes a vertical magnet M586 for moving the wiper set in the vertical direction, a rotary magnet M581 for moving the wiper set in the rotary direction and a release magnet M568 for releasing the wiper set and for causing it to be returned to its normal-vertical and rotary positions. Also associated with the Strowger mechanism 100 are a number of sets of switch springs S59I, S592, S595, S622 and S690 which are actuated by the various movements of the wiper-set, in a manner more fullydescribed hereinafter. The minor switch 600 comprises a rotary wiper 601 provided with an associated contact bank, including ten circumferentially spacedapart contacts. Also the minor switch 600 includes a rotary Iagnet M602 for rotating the wiper'601 and a release magnet M603 for releasing the wiper 601 and for causing it to be returned to its' normal position. Also a set of switch springs-S604 is associated with the minor switch 600 which is actuated by the rotation of the wiper 60|, in a manner more fully explained hereinafter.

Further the station selector 501) comprises a relay group including a line relay R510,A a busy relay R520, a cut-in rel-ay R530, a hold relay R540, a control relay R550, two series relays R560 and R590,'two timer relays R510 and R580, two control relays R6|0 and R620, a release relay R630, a switching relay R640, ay flash relay R650, a test relay R660,a digit relay R610 and a switchthrough relay R680, and a'control network connected and arranged in a manner more fully described hereinafter. Also the station selector 500 'comprises a-battery 629 supplying 1104 volt potential and four terminals W, X, Y and Z; the terminals Y and Z being connected together and included in a circuit for energizing the release magnet M588k of the Strowger' mechanism 100, and the terminals W and X being open-circuited, for a purpose more fully explained hereinafter.

Similarly the station selector 900, shown in Figs. 9 to 11, inclusive, comprises a Strowger mechanism 1|00 and a minor switch 1000, the minor switch |000 constituting a portion of a timing arrangement described in detail hereinafter. The Strowger mechanism 1100 comprises a wiper set, including the wipers 110|.to 1106, inclusive, and an associated contact bank arranged in ten vertical levels, each level including ten circumferentially spaced-apart contact sets. Also the Strowger mechanism 10|) includes a ver. tical magnet M986 for movingv the wiper. set in the vertical direction, a rotary magnet M961 for moving the wiper set in the rotarydirection and a release magnet M968 for releasing thewiper set and for causing it to be returned to its normal vertical and rotary positions. Also associated with the Strowger mechanism |109 'are a number of sets of switch springs S991, S992, S995, S1022 and S1090 which are actuated by the various movements of the wiper set, in a manner more lfully described hereinafter. The minor switch 1000 comprises a rotary wiper provided with an associated contact bank, including ten circumferentially spaced-apart contacts. Also the minor switch |000 includes a-rotary magnet M1002 for rotating the wiper 100| and a release magnet M1063 for releasing vthe wiper 100| and for causing it to be returned to its normal position. Also a set of switch springs S1000 is associated with the minor switch |000 which is actuated by the rotation of the wiper 100|, in a manner more fully explained hereinafter.

Further thestation selector 990 comprises a relay group, including a line relay R910, a busy relay R920, a cut-in relay' R930, a hold relay R940, a control relay R950, two series relays R960 and R990, two timer relays R910 and R980,` two control relays R1010 and R1020, a release relay,R|030, a switching relay R1050, a iiash relay R|050, a test relay R|060,`a digit relay R1010 and a switch-through relay R1080, and a control network connectedand arranged in a 

